[1] San Bortolo Hosp, Dept Nephrol Dialysis & Transplant, I-36100 Vicenza, Italy
[2] IRRIV Int Renal Res Inst Fdn, I-36100 Vicenza, Italy
[3] Univ Modena & Reggio Emilia, Nephrol Dialysis & Renal Transplantat Unit, I-41121 Modena, Italy
[4] San Bortolo Hosp, Dept Clin Chem & Hematol Lab, Viale F Rodolfi 37, I-36100 Vicenza, Italy